/*-
 * ========================LICENSE_START=================================
 * Smooks Core
 * %%
 * Copyright (C) 2020 Smooks
 * %%
 * Licensed under the terms of the Apache License Version 2.0, or
 * the GNU Lesser General Public License version 3.0 or later.
 * 
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-or-later
 * 
 * ======================================================================
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * ======================================================================
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * =========================LICENSE_END==================================
 */
package org.smooks.delivery;

import org.smooks.delivery.sax.SAXElement;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * Fragment.
 * <p/>
 * Wrapper class for a DOM or SAX Fragment.
 *
 * @author <a href="mailto:tom.fennelly@gmail.com">tom.fennelly@gmail.com</a>
 */
public class Fragment {

    private Element domFragment;
    private SAXElement saxFragment;

    public Fragment(Element fragmentElement) {
        this.domFragment = fragmentElement;
    }

    public Fragment(SAXElement fragmentElement) {
        this.saxFragment = fragmentElement;
    }

    public Element getDOMElement() {
        return domFragment;
    }

    public SAXElement getSAXElement() {
        return saxFragment;
    }

    public Object getElement() {
        if(saxFragment != null) {
            return saxFragment;
        } else {
            return domFragment;
        }
    }

    public boolean isDOMElement() {
        return (domFragment != null);
    }

    public boolean isSAXElement() {
        return (saxFragment != null);
    }

    public String getNamespaceURI() {
        if(isSAXElement()) {
            return saxFragment.getName().getNamespaceURI();
        } else if(isDOMElement()) {
            return domFragment.getNamespaceURI();
        }
        return null;
    }

    public String getPrefix() {
        if(isSAXElement()) {
            return saxFragment.getName().getPrefix();
        } else if(isDOMElement()) {
            return domFragment.getPrefix();
        }
        return null;
    }

    public boolean isParentFragment(Fragment fragment) {
        if(fragment.isDOMElement() && isDOMElement()) {
            Node parent = fragment.domFragment.getParentNode();
            while(parent != null) {
                if(parent == domFragment) {
                    return true;
                }
                parent = parent.getParentNode();
            }
        } else if(fragment.isSAXElement() && isSAXElement()) {
            SAXElement parent = fragment.saxFragment.getParent();
            while(parent != null) {
                if(parent == saxFragment) {
                    return true;
                }
                parent = parent.getParent();
            }
        }

        return false;
    }

    @Override
    public boolean equals(Object obj) {
        if(obj instanceof Fragment) {
            Fragment fragObj = (Fragment) obj;
            return (this.domFragment == fragObj.domFragment && this.saxFragment == fragObj.saxFragment);
        }

        return false;
    }
}
